i41CX+

i41CX+

RPN Calc with Printer and CAS

104 ratings
264 reviews
$24.99

Details

  • Released
  • Updated
  • February 1, 2019
  • January 28, 2026
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About

This advanced RPN scientific calculator offers workstation-class Computer Algebra System (CAS) capabilities, going beyond traditional replicas. It provides access to an extensive library of modules and programs, enhanced with iOS features, customizable skins, and iCloud support for seamless data management.

RPN logic with 4-element stack
Extensive memory registers
Over 400 built-in functions
Computer Algebra System (CAS)
Virtual thermal printer/plotter
Access to HP-41 module library
Customizable skins and keyboard overlays
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What users say

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What's New in i41CX+

7.6.19

January 28, 2026

• Fixed bug introduced in 7.6.18

User reviews

HP41 étendue

Pour les fans d’HP41 et même de la récente DM41X, cette version software comporte des fonctionnalités étendues extraordinaires . Notamment dans le domaine du chargement, déchargement de programmes (et de modules) et leur édition externe. Un outil incontournable pour tous ceux qui travaillent depuis 40 dans l’univers de calcul et de programmation HP41
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Thank you for this fantastic app!

The HP41 was a breakthrough calculator in its time. I still love it, and the i41CX+ app is a wonderful implementation of this great calc. Worth every penny!

iOSで動く最高の電卓の一つ

HP-41Cシリーズには膨大な数のモジュールがあり、このi41CX+で利用することができます。
さらにREDUCEというCASが搭載されているのでモダンな数学用の電卓にもひけを取りません。
iOSで動く最高の電卓の一つだと思います。

My goto scientific calc for years

This has been my go to calculator and I find it is the best emulation of the 41CV/CX family. It goes beyond that in many ways from memory to the expanded capabilities. It has always responsive, and has never crashed.

Real HP 41 CV an CXs got me through college. Yes that was a long time ago. The access to modules has allowed me to use some of the extended features that made the original so powerful. I was very much into synthetic and Forth programming on the original calculators.

I still use some of the programs I wrote in college on this calculator.

I wish there was a macOS version of this app.
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MEGA !

Diese App bringt den HP-41CX perfekt auf‘s iPhone. Dann kann das gute Museums-Stück in der Vitrine bleiben. Der schnelle Service von AL lässt auch keine Wünsche offen. Großes Dankeschön!
GB

Developer apps

User experience

🐞

Reported Bugs

2 issues

Issues with the 41Z math module producing garbled output

Bug

Scaling problems with overlays

Bug

Requested Features

4 requests

Landscape mode for better button size

Feature

Haptic feedback for button presses

Feature

Ability to load and save programs/modules via cloud/email

Feature

Macros or scripting support

Feature

FAQ

What does the i41CX+ app do?

The i41CX+ app is an advanced programmable RPN scientific calculator that includes workstation-class Computer Algebra System (CAS) capabilities. It functions as a virtual thermal printer/plotter and offers access to an extensive library of modules and programs, enhancing the functionality of the original HP-41CX.

What are the key features of this calculator app?

Key features include RPN logic with a deep memory stack, a large number of memory registers, over 400 built-in functions, a powerful CAS for symbolic calculations, a virtual thermal printer/plotter, and access to the entire HP-41 library of modules and programs. It also supports customizable skins, keyboard overlays, and iCloud syncing.

How much does the i41CX+ app cost?

Based on the provided information, the app is a paid application. There are no mentions of free trials, subscriptions, or in-app purchases, indicating a one-time purchase model.

What devices is i41CX+ compatible with?

The app is designed for iOS devices. It leverages iOS features such as iCloud support, notification center widgets, and integration with system keyboards, Bluetooth keyboards, and external displays.

Who would benefit from using the i41CX+ app?

This app is ideal for users who need a powerful and versatile scientific or engineering calculator. This includes students, scientists, engineers, and financial professionals who require advanced mathematical, statistical, and symbolic computation capabilities, as well as the ability to run legacy HP-41 programs.